CVE-2026-57915 (CVSS 7.3)

Description

It is possible to bypass the Kerberos pre-authentication check in Apache Kerby by sending a PA-DATA with an unrecognized or unsupported type. Users are recommended to upgrade to version 2.1.2, which fixes this issue.

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CVSS v3.1 Score

7.3

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploit Prediction

0.0032

Probability of exploitation

0.24%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-304 CWE-304

CWE-358 CWE-358

References

Other References

https://lists.apache.org/thread/1y3glgh3kzwoxo5m2lq504cjlh1dsrfh http://www.openwall.com/lists/oss-security/2026/06/26/8 https://access.redhat.com/security/cve/CVE-2026-57915 https://bugzilla.redhat.com/show_bug.cgi?id=2493407 https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57915.json

Frequently Asked Questions

What is CVE-2026-57915? +

It is possible to bypass the Kerberos pre-authentication check in Apache Kerby by sending a PA-DATA with an unrecognized or unsupported type. Users are recommended to upgrade to version 2.1.2, which fixes this issue. It has a CVSS v3.1 base score of 7.3 (HIGH).

How severe is CVE-2026-57915? +

CVE-2026-57915 has a CVSS v3.1 score of 7.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0032, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-57915? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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